Lake freighter

English:Lake freighters (lakers) carry bulk cargoes on the Great Lakes in North America. Many ship names were reused after boats were sunk, scrapped or sold off and renamed. The same name may apply to four or even five different ships.

Integrated tug-barges features dedicated tugs with coupling equipment which mates with receivers in v-notches in the barges, effectively creating a unified unit. On the Great Lakes, these barges have often been created by cutting of the engine room and superstructures of old freighters.